Spray-head for air-washers.



S. R. SHELDON.

SPRAY HEAD FOR AIR WASHERS.

APPLICATION FILED JULY 30, 1912.

Patented Apr. 1, 1913.

INVENTOR S F? SHELD ON MTNEssEs SIDNEY'RANDOLPH SHELDON, OF GALT,ONTARIO, CANADA.

SPrtAY-HEAD FOR AIILWASHERS.

Specification of Letters Eatent.

Patented Apr. 1, 1M3.

Application filed July 30, 1912. Serial No. 712,344.

spray heads for air washers and the object of the invention is to devisea spray head operated by water pressure for flushing out the sprayorifice of the head at predetermined intervals to remove any foreignmatter from the spray orifice and it consists essentially of a maincasing comprising a tubular portion having an annular enlargement at oneend and a flared orifice at the opposite end and suitable feed orifices,a-

spindle held longitudinally in suitable bearings within the tubularportion, a spray nut secured to one end of the spindle, a major and.minor diaphragm secured centrally to the opposite end of the spindleand at their periphery to the enlargement of the spray head, a supplypipe leading into the enlargement at the opposite side of the majordiaphragm from that on which the minor diaphragm is located, and meansfor regulating thelongitudinal movement of the operating spindle ashereinafter more particularly explained by the following specification.

Figure 1, is a genera perspective view of a spray head. Fig. 2, is alongitudinal section through the spray head. Fig. 3, is a cross sectionon line acy Fig. 2.

In the drawings like letters of reference indicate corresponding partsin each figure. A is the main casting of the spray head comprising atubular portion A terminating at one end in the contracted portion A?merging into an outwardly flared portion A The opposite end of theportion A is flared outwardly at A to form a casing A provided with anannular flange A.

A is the cap for the casing also provided with a flange A secured to theflange A by suitable screws A". The cap A is arched so as to form aspace A into which the feed pipe A leads.

B is a longitudinal bearing forming part of the main portion A of thespray head to which it is connected by webs 3. The portion A of thespray head is preferably provided with a central enlargement A forming acrossT into which the usual fwd pipe for conveying the water into thespray head extends.

C is a longitudinally movable spindle held in the bearings Band'provided at one end with a reduced threaded portion C on to whichthe spray nut C is threaded.

D is a major diaphragm secured to the reduced threaded portion (1* ofthe longitudinally movable spindle C by the'nut D and spacing sleeve DThe outer edge of the major diaphragm D extends between the flanges Aand A between which it is secured by the screws A".

D is a minor diaphragm secured centrally against the spacing sleeveD bythe nut D.

A is an annular shoulder formed in the -enlargement A and A is a ringsecured to The outer F is a set screw extending through the cap Aagainst the end of the operating spindle C. By adjust-ing the set screwF the annular spray opening between the flared end of the tubularportion of the s ray head and the spray nut may be regulate In order toregulate the longitudinal movement of the operating spindle C I providean adjusting nut G.

Having described theprincipal parts 1nvolved in my invention I willbriefly describe the operation of the same. It Wlll be understood thatthe water forming the spray is fed into the spray head through theportion A". The water is forced therefrom through the annular sprayorifice at one end of the spray head and against the minor diaphragm Dat the opposite end of the spray head keeping the spray opening normallyvery narrow. In this narrow opening lint and other foreign matter isliable to stick and clog the opening. When it is desired to flush thespray orifice pressure is supplied through the pipe A into the space Aand against the major diaphra in. I) thus forcing the spindle C longitumally against the pressure of the water aga nst the minor diaphragm Dthereby carrying the spray nut C away from the flared opening A to widenthe spray opening and allow the I water to carry any foreign matter outfrom the opening. The pressure against the major diaphragm is then outOE and the spindle C carried back in the opposite direction of arrow tobring the nut G into its normal position. By regulating the nut G themovement of the spindle C is regulated so as to limit the extent towhich the opening is opened for the purpose of flushing.

From this description it will be seen that I have devised a very simplemeans for flushing the spray head and utilizing the water pressure tooperate the flushing mechanism of the spray head so that any foreignmatter clogging the spray opening may be automatically removed byenlarging the spray opening.

What I claim as my invention is.

1. A spray head comprising a main casting having a tubular portionhaving a spray opening at one end, a water inlet intermediate of itslength, and an annular enlargement at its opposite end, a covering forsuch annular enlargement having a water inlet, a longitudinal bearingformed within the tubular portion, a longitudinally movable spindle heldwithin the bearing, a spray nut secured to the outer end of the spindle,a major and a minor diaphragm secured cen trally to the opposite end ofthe spindle, and peripherally to the inner periphery of the enlargementof the main casting, and a nut threaded on to the spindle between theminor diaphragmand the longitudinal hearing, as and for the purposespecified.

2. A spray head comprising a main casting having a tubular portionhaving a spray opening at one end, a Water inlet intermediate of itslength, an annular enlargement at its opposite end, a covering for suchannular enlargement having a water inlet, a longitudinal bearing formedwithin the tubular portion, a longitudinally movable spindle held withinthe bearing, a spray nut secured to the outer end of the spindle, amajor and a minor diaphragm secured centrally to the opposite end of thespindle, and peripherally to the inner periphery of the enlargement ofthe main cast-ing, and a nut threaded on to the spindle between theminor diaphragm and the longitudinal bearing, and means for adjustingthe normal size of the spray opening, as and for the purpose specified.

3. A spray head comprising a main casting having'a tubular portionhaving a spray opening at one end, a Water inlet intermediate of itslength, an annular enlargement at its opposite end, a covering for suchannular enlargementhaving a water inlet, alongitudinal bearing formedWithin the tubular portion, a longitudinally movable spindle held Withinthe bearing, a spray nut secured to the outer end of the spindle, amajor and a minor diaphragm secured centrally to the opposite end of thespindle, and peripherally to the inner periphery of the enlargement ofthe main casting, and a nut threaded on to the spindle between the minordiaphragm and the longitudinal bearing, as and for the purposespecified.

4. A spray head comprising a tubular portion having a spray opening atone end, and an annular enlargement at the opposite end, a cover forsuch enlargement having a water inlet opening, a bearing forming part ofthe main casting and extending longitudinally through the tubularportion thereof, a longitudinally movable spindle held therein, a.

spray nut secured to one end of the spindle, a major and a minordiaphragm secured centrally to the opposite end of the spindle andperipherally to the inner periphery of the enlargement, and a set screwextending through the covering of the enlargement against the end of thespindle, as and for the purpose specified.

SIDNEY RANDOLPH summon.

Witnesses ROBERT DONALDSON, J. A. STEPHENSON.

